This plugin plots the position of stars with exoplanets. Exoplanets data is derived from "[http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia]"

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This plugin plots the position of stars with exoplanets. Exoplanets data is derived from "[http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia]". List of potential habitable exoplanets and data about them were taken from "[http://phl.upr.edu/projects/habitable-exoplanets-catalog The Habitable Exoplanets Catalog]" by [http://phl.upr.edu/home Planetary Habitability Laboratory].

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Example (HD 13808):

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http://stellarium.org/wikiimg/exoplanets/exoplanets.jpg

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===Potential habitable exoplanets===

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Since version 0.1.12 (Stellarium 0.13.0) this plugin can display potential habitable exoplanets (orange marker) and some information about those planets - habitable class, mean surface temperature and Earth Similarity Index.

* '''Mean Surface Temperature''' — Temperature in (K)<ref>Stellarium re-calculate temperature in (°C).</ref> based on a similar terrestrial atmosphere to planet mass ratio and a greenhouse effect due to 1 percent of CO<sub>2</sub> (assuming an albedo of 0.3 in all cases).

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* '''[http://en.wikipedia.org/wiki/Earth_Similarity_Index Earth Similarity Index] (ESI)''' — Similarity to Earth on a scale from 0 to 1, with 1 being the most Earth-like. ESI depends on the planet's radius, density, escape velocity, and surface temperature.

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==Section [Exoplanets] in config.ini file==

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You can edit <tt>config.ini</tt> file by yourself for changes of the settings for the Exoplanets plugin - just make it carefully!

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{| class="guidetable"

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| rowspan="2" | ''ID''

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| rowspan="2" | ''Type''

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| colspan="2" style="text-align:center;" | ''Version''

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| rowspan="2" | ''Description''

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|-

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| ''Plugin''

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| ''Stellarium''

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|-

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|last_update

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|string

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|0.1.2+

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|0.11.4+

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|Date and time of last update

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|-

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|update_frequency_hours

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|int

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|0.1.2+

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|0.11.4+

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|Frequency of updates, in hours

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|-

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|updates_enable

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|bool

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|0.1.2+

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|0.11.4+

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|Enable updates of exoplanets catalog from Internet

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|-

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|url

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|string

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|0.1.2+

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|0.11.4+

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|URL of exoplanets catalog

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|-

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|flag_show_exoplanets_button

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|bool

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|0.1.11+

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|0.12.3+

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|Enable showing button of exoplanets on bottom bar

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|-

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|distribution_enabled

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|bool

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|0.1.4+

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|0.12.0+

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|Enable distribution mode of display

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|-

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|timeline_enabled

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|bool

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|0.1.4+

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|0.12.0+

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|Enable timeline mode of display

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|-

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|enable_at_startup

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|bool

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|0.1.10+

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|0.12.2+

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|Enable displaying exoplanets at starup plugin

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|}

==Using the Exoplanets plugin==

==Using the Exoplanets plugin==

Line 29:

Line 100:

"angleDistance": angle distance from star (arcseconds),

"angleDistance": angle distance from star (arcseconds),

"discovered": exoplanet discovered year,

"discovered": exoplanet discovered year,

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"hclass": "habitable class",

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"MSTemp": mean surface temperature (K),

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"ESI": Earth Similarity Index (*100),

"planetName": "designation of planet"

"planetName": "designation of planet"

},

},

Line 40:

Line 114:

"angleDistance": angle distance from star (arcseconds),

"angleDistance": angle distance from star (arcseconds),

"discovered": exoplanet discovered year,

"discovered": exoplanet discovered year,

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"hclass": "habitable class",

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"MSTemp": mean surface temperature (K),

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"ESI": Earth Similarity Index (*100),

"planetName": "designation of planet"

"planetName": "designation of planet"

}

}

Line 50:

Line 127:

"sradius": value of radius of star (R sun),

"sradius": value of radius of star (R sun),

"effectiveTemp": value of effective temperature of star (K),

"effectiveTemp": value of effective temperature of star (K),

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"hasHP": boolean (has potential habitable planets),

"RA": "Right ascension (J2000)",

"RA": "Right ascension (J2000)",

"DE": "Declination (J2000)"

"DE": "Declination (J2000)"

Line 100:

Line 178:

! Significant changes

! Significant changes

|-

|-

−

| ''0.1.1''

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| 0.1.2

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| ''0.11.4''

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| 0.11.4

| 1

| 1

| First public version of plugin

| First public version of plugin

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|-

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| 0.1.4

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| 0.12.0

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| 1

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| Use new rendering engine of core; Distribution mode; Timeline mode

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|-

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| 0.1.5

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| 0.12.1

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| 1

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| Display the detection method of exoplanet

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|-

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| 0.1.10

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| 0.12.2

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| 1

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| Improvements for search tool. Updated code. Improvements for GUI.

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|-

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| 0.1.11

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| 0.12.3

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| 1

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| Updated code.

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|-

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| 0.1.12

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| 0.13.0

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| 1

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| Display potential habitable planets.

|}

|}

==Acknowledgment==

==Acknowledgment==

We thank the following people for their contribution and of the valuable comments:

We thank the following people for their contribution and of the valuable comments:

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* Jean Schneider (Maintainer of "[http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia]" who grant permission us use its catalog)

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* Jean Schneider (Maintainer of "[http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia]" who grant permission us use its catalog).

Mean Surface Temperature — Temperature in (K)[1] based on a similar terrestrial atmosphere to planet mass ratio and a greenhouse effect due to 1 percent of CO2 (assuming an albedo of 0.3 in all cases).

Earth Similarity Index (ESI) — Similarity to Earth on a scale from 0 to 1, with 1 being the most Earth-like. ESI depends on the planet's radius, density, escape velocity, and surface temperature.

Section [Exoplanets] in config.ini file

You can edit config.ini file by yourself for changes of the settings for the Exoplanets plugin - just make it carefully!

ID

Type

Version

Description

Plugin

Stellarium

last_update

string

0.1.2+

0.11.4+

Date and time of last update

update_frequency_hours

int

0.1.2+

0.11.4+

Frequency of updates, in hours

updates_enable

bool

0.1.2+

0.11.4+

Enable updates of exoplanets catalog from Internet

url

string

0.1.2+

0.11.4+

URL of exoplanets catalog

flag_show_exoplanets_button

bool

0.1.11+

0.12.3+

Enable showing button of exoplanets on bottom bar

distribution_enabled

bool

0.1.4+

0.12.0+

Enable distribution mode of display

timeline_enabled

bool

0.1.4+

0.12.0+

Enable timeline mode of display

enable_at_startup

bool

0.1.10+

0.12.2+

Enable displaying exoplanets at starup plugin

Using the Exoplanets plugin

Enable the tool by clicking the tool-bar button "Load at startup"

Find the stars with exoplanets by their designation (24 Sex as example)

Catalog of stars with exoplanets

You can modify the exoplanets.json file manually using a text editor. If you are using Windows, it is strongly recommended to use an advanced text editor such as Notepad++ to avoid problems with end-of-line characters. (It will also color the JSON code and make it easier to read.)

Warning: Before editing your JSON file, make a backup copy. Leaving out the smallest detail (such as a comma or forgetting to close a curly bracket) will prevent Stellarium from starting.

The path to the directory which contains exoplanets.json is something like: